From: Allen Ballway ballway@chromium.org
[ Upstream commit a2f416bf062a38bb76cccd526d2d286b8e4db4d9 ]
Certain touchscreen devices, such as the ELAN9034, are oriented incorrectly and report touches on opposite points on the X and Y axes. For example, a 100x200 screen touched at (10,20) would report (90, 180) and vice versa.
This is fixed by adding device quirks to transform the touch points into the correct spaces, from X -> MAX(X) - X, and Y -> MAX(Y) - Y.
Signed-off-by: Allen Ballway ballway@chromium.org Signed-off-by: Jiri Kosina jkosina@suse.cz Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hid/hid-multitouch.c | 39 ++++++++++++++++++--- drivers/hid/hid-quirks.c | 6 ++++ drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c | 43 ++++++++++++++++++++++++ drivers/hid/i2c-hid/i2c-hid.h | 3 ++ 4 files changed, 87 insertions(+), 4 deletions(-)
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 372cbdd223e09..e31be0cb8b850 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -71,6 +71,7 @@ MODULE_LICENSE("GPL"); #define MT_QUIRK_SEPARATE_APP_REPORT BIT(19) #define MT_QUIRK_FORCE_MULTI_INPUT BIT(20) #define MT_QUIRK_DISABLE_WAKEUP BIT(21) +#define MT_QUIRK_ORIENTATION_INVERT BIT(22)
#define MT_INPUTMODE_TOUCHSCREEN 0x02 #define MT_INPUTMODE_TOUCHPAD 0x03 @@ -1009,6 +1010,7 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input, struct mt_usages *slot) { struct input_mt *mt = input->mt; + struct hid_device *hdev = td->hdev; __s32 quirks = app->quirks; bool valid = true; bool confidence_state = true; @@ -1086,6 +1088,10 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input, int orientation = wide; int max_azimuth; int azimuth; + int x; + int y; + int cx; + int cy;
if (slot->a != DEFAULT_ZERO) { /* @@ -1104,6 +1110,9 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input, if (azimuth > max_azimuth * 2) azimuth -= max_azimuth * 4; orientation = -azimuth; + if (quirks & MT_QUIRK_ORIENTATION_INVERT) + orientation = -orientation; + }
if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) { @@ -1115,10 +1124,23 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input, minor = minor >> 1; }
- input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x); - input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y); - input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx); - input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy); + x = hdev->quirks & HID_QUIRK_X_INVERT ? + input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->x : + *slot->x; + y = hdev->quirks & HID_QUIRK_Y_INVERT ? + input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->y : + *slot->y; + cx = hdev->quirks & HID_QUIRK_X_INVERT ? + input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->cx : + *slot->cx; + cy = hdev->quirks & HID_QUIRK_Y_INVERT ? + input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->cy : + *slot->cy; + + input_event(input, EV_ABS, ABS_MT_POSITION_X, x); + input_event(input, EV_ABS, ABS_MT_POSITION_Y, y); + input_event(input, EV_ABS, ABS_MT_TOOL_X, cx); + input_event(input, EV_ABS, ABS_MT_TOOL_Y, cy); input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state); input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation); input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p); @@ -1735,6 +1757,15 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID) td->serial_maybe = true;
+ + /* Orientation is inverted if the X or Y axes are + * flipped, but normalized if both are inverted. + */ + if (hdev->quirks & (HID_QUIRK_X_INVERT | HID_QUIRK_Y_INVERT) && + !((hdev->quirks & HID_QUIRK_X_INVERT) + && (hdev->quirks & HID_QUIRK_Y_INVERT))) + td->mtclass.quirks = MT_QUIRK_ORIENTATION_INVERT; + /* This allows the driver to correctly support devices * that emit events over several HID messages. */ diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c index be3ad02573de8..d13f8e6ccee45 100644 --- a/drivers/hid/hid-quirks.c +++ b/drivers/hid/hid-quirks.c @@ -19,6 +19,7 @@ #include <linux/input/elan-i2c-ids.h>
#include "hid-ids.h" +#include "i2c-hid/i2c-hid.h"
/* * Alphabetically sorted by vendor then product. @@ -1297,6 +1298,11 @@ unsigned long hid_lookup_quirk(const struct hid_device *hdev) quirks = hid_gets_squirk(hdev); mutex_unlock(&dquirks_lock);
+ /* Get quirks specific to I2C devices */ + if (IS_ENABLED(CONFIG_I2C_DMI_CORE) && IS_ENABLED(CONFIG_DMI) && + hdev->bus == BUS_I2C) + quirks |= i2c_hid_get_dmi_quirks(hdev->vendor, hdev->product); + return quirks; } EXPORT_SYMBOL_GPL(hid_lookup_quirk); diff --git a/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c b/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c index 8e0f67455c098..554a7dc285365 100644 --- a/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c +++ b/drivers/hid/i2c-hid/i2c-hid-dmi-quirks.c @@ -10,8 +10,10 @@ #include <linux/types.h> #include <linux/dmi.h> #include <linux/mod_devicetable.h> +#include <linux/hid.h>
#include "i2c-hid.h" +#include "../hid-ids.h"
struct i2c_hid_desc_override { @@ -416,6 +418,28 @@ static const struct dmi_system_id i2c_hid_dmi_desc_override_table[] = { { } /* Terminate list */ };
+static const struct hid_device_id i2c_hid_elan_flipped_quirks = { + HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_ELAN, 0x2dcd), + HID_QUIRK_X_INVERT | HID_QUIRK_Y_INVERT +}; + +/* + * This list contains devices which have specific issues based on the system + * they're on and not just the device itself. The driver_data will have a + * specific hid device to match against. + */ +static const struct dmi_system_id i2c_hid_dmi_quirk_table[] = { + { + .ident = "DynaBook K50/FR", + .matches = { + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dynabook Inc."), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "dynabook K50/FR"), + }, + .driver_data = (void *)&i2c_hid_elan_flipped_quirks, + }, + { } /* Terminate list */ +}; +
struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name) { @@ -450,3 +474,22 @@ char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name, *size = override->hid_report_desc_size; return override->hid_report_desc; } + +u32 i2c_hid_get_dmi_quirks(const u16 vendor, const u16 product) +{ + u32 quirks = 0; + const struct dmi_system_id *system_id = + dmi_first_match(i2c_hid_dmi_quirk_table); + + if (system_id) { + const struct hid_device_id *device_id = + (struct hid_device_id *)(system_id->driver_data); + + if (device_id && device_id->vendor == vendor && + device_id->product == product) + quirks = device_id->driver_data; + } + + return quirks; +} +EXPORT_SYMBOL_GPL(i2c_hid_get_dmi_quirks); diff --git a/drivers/hid/i2c-hid/i2c-hid.h b/drivers/hid/i2c-hid/i2c-hid.h index 96c75510ad3f1..2c7b66d5caa0f 100644 --- a/drivers/hid/i2c-hid/i2c-hid.h +++ b/drivers/hid/i2c-hid/i2c-hid.h @@ -9,6 +9,7 @@ struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name); char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name, unsigned int *size); +u32 i2c_hid_get_dmi_quirks(const u16 vendor, const u16 product); #else static inline struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name) @@ -16,6 +17,8 @@ static inline struct i2c_hid_desc static inline char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name, unsigned int *size) { return NULL; } +static inline u32 i2c_hid_get_dmi_quirks(const u16 vendor, const u16 product) +{ return 0; } #endif
/**